Bobbin protector



May 10, 1932. B. F. MACK BOBBIN PROTECTOR I Filed Nov. 1, 1929 6 f I l VENTOR M ATTORNEY; I

Patented May 10, 1932" i j I I as FATE i asic-E3 BERNARD FENTON MAcmor-Ammv'rown,rnnnsvnvi m I BQIBZBIN rno'reo ron Application filefl November 1,1929. Serial naaoaeza' This invention relates'to a bobbin protec- 'lhe protector is preferably in 'theformo'f tor or guard and more particularly to a proa circularportion or plate'of suitable diame tector applied to a bobbin at one end co'nsidterto cover the end of the central projection ered asthebase and adapted to cooperate with ofthe spool and'has at its periphery an in I a suitable driving-spindle in elfectin'ga suitwardly extending flange fitting around the '55 able driving connection between thebobbin lateralsurface of said projection andserving I and thespindle. V 1 both to 'ce'nterthe protector on theprojection An important object of the invention is to butalso to prevent separation of parts at the provide a novel bobbin protector which. will outer end of the bushing. f be especially 'efiective' to protect thebobbin The circular portion of the'protectoris co end,and will also be conducive to anefi'ective slotted to form an opening to register "with driving connection between the bobbin and the central bore of the bush and withrecesses a driving spindle. Another object is to proin the outer end of the bush at the side of the; j

.vide a device ofthis characterwhichwill be central bore; and may be provided with 1.5 simple in structure and. economical to inanumeans to assist in' placing'ule slotin the cir 65' facture. I V cular portion of the protector in register Other objects and advantages will be apwith the openings in theendof the bush, the

parent upon consideration of the following means for determining such positioning cohdescription and of the accompanying "drawsisting of tabs or tongues attached to the ciring i which; I cularporti'on of the pr otect orandfengaging 70 Fig." 1 is a front elevation, partlyin secthe side walls of the recesses in the end o'f'the 'tion, illustrating a bobbin embodying iny'iubush. p f r i vention;1 The protector may befheld on the bush in Fig. 2 is a bottom view of the bobbin shown any suitable mannervas,'for example, by formv i Fi 1; d r j j ing in said flange a sufficient number of pin 75 Fig. 3 is a perspective view showing the pricks projecting into saidbushanjd cooper-"Z parts in exploded or separated relation. ating with the material of saidbush tohold The objects of thejinvention maybe athe pro e tor'in positi ni i *9;

tained in a preferred manner by applying a Referring to the drawings; 10 designatesa bobbin protector or guard, such as illustrated bobbin or spool, having a barrel 1 1, prefer- 80' in the drawings, to a central cylindrical proably of wood, and heads 12' and 13preferably v jection extending outwardly beyond the outer secured thereto at its ends. As illustrated in 1 surface of the adjacent spool end. Pr'efer- Figs. 1' and 3, the head 13 is substantially flat" ably this central projection is the outer end 'and'annularwith the central opening of subof a bush or bushing used to attach the ad stantially the same diameter asthe bore at 8.

jacent head or bobbin to the barrel of the the adjacent end of the barrel. The head 13 bobbin. This bush at the base of the bobbin is also formed at its inner "face with an annuhas a central bore to receive the straight porlar recess to receive the adjacent end of the tion or shaft of a driving spindle and is rebarrel and also'with a corresponding recess cessed at its outer end to receive driving proat the outerface of the head, thus providing "'90 jections on the spindle adjacent to the base an internal flange 14 at the centralopening thereof. (This spindle structure is not of the head 13. j shown but may be of a usual form.) The head 13 may be held on the end of the Preferably such recessed end is formed barrel merely by 'useof a bush or bushing 15 a bore at opposite sides thereof so that in conthe central opening of the head and into the" nection with the outer end of said central bore at the adjacent end ofthe spool, and bore they form a single slot which preferably head 17 fitting into the recess at the outerl does not extend to the periphery of the cyside of the flange 14. Preferably glue is apwith recesses communicating with the central having a tapered portion-16 forced through 195 lindrical central projection. plied so that when the bushing isforced into 1 v i the end of the barrel it will be held in such position by the glue as well as by the pressure between the parts. To assist in positioning the parts and maintaining them in proper relative position the barrel 11 may be provided with longitudinal projections or tongues 18 adapted to enter corresponding recesses 19 in the flange 14. V

The head 12 in'substantially the same manner as the head 13 but as hereshown the'bush securing. the head 12 is shown finished with its outer end flush with the outer face of the corresponding head of the bobbin, whereas the bush, 15 at the base or driving end of the bobbin is finishedso that its head constitutes a central cylindrical extension of the spool. The bushes 1 5 atjthe ends of the bobbin have aligned central bores to receive the driving spindle and the head17 of the bushing at base of the bobbin is provided at its outer end and at .opposite sides of the central bore. withv countersunk'recesses 21 preferably communieating with said bore and'extending part way from the central bore tothe periphery of the outer end of. said extension, such recesses 21 beingprovided to receive projections or parts (not shown) connected rigidly with said spin- Idle (not shown) adjacent to itsbase and the spindle anda suitable spool placed thereserving to effect a drivingconnection between According to the preferred form of the invention, the bobbin mg across the end of the central cylindrical extension formed by the head 17 of the bush atthedriving end of the bobbin, and with an annular flange 24 fitting around the head 17 and extending toward the head 13 of the bobs bin. The circular portion 23 of the protector is cut out to form a slot'25 having a central spindle receiving portion and end I portions 26, to register with: said. countersunk recesses- 21.

In forming the end portions 26 of the slot 7 25,;part of the metal extending across these v portions may be formed into tabs'or tongues 27turned back from the plane of said cen- V tra-l portion 23 to cooperate with the sides of said recesses'21 in the outer end of the bobbin extension andserve to position the protector on the projection of the bobbin and also wear which would result from to. protect the sides of the recesses against direct contact between the wood and the driving portions of the spindle. I

The protector may be secured to the -extension in any suitable manner, by-means of a suitable number of projections 28 which may be formed by pin pricks) extending from the flange24 into the wood of the bobbin extension.

It will be seen that. the. flange 24'serves both for centering the protector 22 and for may be secured to the barrel.

7 protector 22 is made of sheet metal with a circular portion 23 extendretaining it in position on the bobbin extension, as wellas for protecting the extension against splitting, and that the tongues 27 serve to position the protector on the bobbin extension so that the slot 25 of the protector will be in register with the openings in the end of the bobbin extension.

It should be understood that changes may be made in the construction and arrangement of the parts and certain parts may be used without others without departing from the true spirit and scope of the invention.

Having thus described myvinvention, I claim:

l; The combination with a bobbin having a barrel, two ends and a central extension beyond one of saidends, said bobbin having. a central longitudinal bore to receive a driving spindle having projections connected therewith and thereof'at the sides and said central exten sionhaving recesses to receive said projec-V tions on said spindle and said recesses extending from said centrallongitudinal bore to points spaced inwardly from the lateral surface of said extension,- of a protector for said extension including an annular flange extending around the lateral surface of said centralextension of the bobbin and a part attached to said flange and extendingacross the end of said extension and provide'diwith a central opening to receive the shaft of the spindle and laterally extendingoopeningsin extending longitudinally the bore to barrel and a a central opening and radial openings to register with said slots in the central extension of the bobbin and tongues said slots fromthe sideedges of saidradial, openings.

projecting into f In witness whereof, I aflix my signature.

BERNARD FEN TON MACK.

for example, i 

